Anisotropic polarizability of ultracold ground-state Na <mml:mprescripts/> <mml:none/> 23 Rb <mml:mprescripts/> <mml:none/> 87 molecules

2020/12/21 by Junyu Lin, J. He, Junyu He +2
Chemistry · Physics and Astronomy · #Advanced Frequency and Time Standards #Anisotropy #Atomic physics #Chemistry #Cold Atom Physics and Bose-Einstein Condensates #Excited state #Ground state #Isotropy #Molecule #Optics #Physical chemistry #Physics #Polarizability #Polarization (electrochemistry) #Quantum mechanics #Spectroscopy #Strong Light-Matter Interactions #cond-mat.quant-gas #physics.atom-ph

paper · pdf · doi:10.1103/physreva.103.023332

6 pages, 5 figures

arxiv created 2020/12/21 · openalex created_date 2021/01/05 · openalex publication_date 2021/02/25 · arxiv updated 2021/03/17 · openalex updated_date 2026/08/06

Abstract

We report measurements of the AC polarizabilities of ultracold ground-state ²³Na⁸⁷Rb molecules. While the polarizability of the ground rotational state J=0 is isotropic, that of the first excited rotational state J=1 is anisotropic and depends strongly on the light polarization angle. We obtain both polarizabilities precisely by combining trap oscillation frequency measurement and high-resolution rotational spectroscopy driven by microwave. With the optimized light polarization angle and intensity combination, the nonuniformity of the differential AC Stark shift between the two rotational states is minimized and the rotational coherence time is observed to be the longest.

Citations

• Relativistic many-body calculations of electric-dipole matrix elements, lifetimes, and polarizabilities in rubidium
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